package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.properties.JwtProperties;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Slf4j
@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;
    @Autowired
    private HttpServletRequest request;
    @Autowired
    private JwtProperties jwtProperties;
    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));
        //System.out.println(password);
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 员工注册
     * @param employeeDTO
     */
    @Override
    public void register(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        //属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes(StandardCharsets.UTF_8)));
        //设置账号状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置创建修改时间,通过aop进行完善,不需要手动封装
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
        //设置创建修改人
        //TODO 后期修改为动态值
        /*
        //通过HttpServletRequest对象,获取请求头并解析,得到员工表的id
        String jwt = request.getHeader("token");
        Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(), jwt);
        log.info("jwt解析:{}",claims);
        Long id = Long.valueOf(claims.get(JwtClaimsConstant.EMP_ID).toString());
        log.info("id:{}",id);
       */
        //通过ThreadLocal对象,共享线程中的数据(JwtTokenAdminInterceptor中存储的数据在这里取出)
        // 通过aop进行完善,不需要手动封装
//        Long id = BaseContext.getCurrentId();
//        employee.setCreateUser(id);
//        employee.setUpdateUser(id);
        employeeMapper.register(employee);
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageSelect(EmployeePageQueryDTO employeePageQueryDTO) {
        //使用limit,查询全部,进行分页
//        int page = employeePageQueryDTO.getPage();
//        int pageSize = employeePageQueryDTO.getPageSize();
//        int index=(page-1)*pageSize;
//        Integer total =employeeMapper.selectTotal();
//        List<Employee> employee = employeeMapper.pageSelectByLimit(index, pageSize);
//        return new PageResult(total,employee);
//        使用pageHeper
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageSelect(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> result = page.getResult();
       return new PageResult(total,result);
    }

    /**
     *帐号状态管理(修改status值)
     * @param status
     * @param id
     */
    @Override
    public void statusManage(Integer status, Long id) {
        Employee employee=new Employee();
        employee.setStatus(status);
        employee.setId(id);
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee selectById(Long id) {
        Employee employee = employeeMapper.selectByid(id);
        employee.setPassword("****");
        return  employee;
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     */
    @Override
    public void updateInformation(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
       // 通过aop进行完善,不需要手动封装
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

}
